Tutorial video, gain/phase of a flyback using a function generator and scope

[rbola35618]

Poor man's frequency response analyzer(Gain and Phase measurement of a flyback supply)

This video is a follow up to a previous video where I used a Venable Frequency Response Analyzer (FRA). Most FRA are out of the budget of most small business or hobbyist. However, you can use a function generator, an injection transformer, and a scope to measure the stability of a power supply such as a flyback.
This video shows you step by step in setting up a function generator, an injection transformer, and a scope to measure the gain and phase of a flyback. By injecting a signal and measuring the amplitude and the phase delay, you can measure three critical power supply specifications such as the crossover frequency, phase margin, and gain margin.